Question

For the following scores,

Participant	X	Y
A	1	3
B	3	5
C	2	1
D	2	3

A) Draw a scatterplot by hand. Upload a scanned copy or picture of the scatterplot.

B)Based on the scatterplot:

The correlation between X and Y is zero

The correlation between X and Y is 1

The correlation between X and Y is positive

The correlation between X and Y is negative

C)Compute the Pearson Correlation Coefficient

r =

Note: If it is a decimal number with two or more than two places, leave only two decimal places after the decimal point and do not round.

If it is a negative correlation, please do not forget to include the negative sign.

D)The correlation between X and Y is

large and positive. As X increases, Y increases

large and positive. As X increases, Y decreases

medium and positive. As X increases, Y increases

medium and positive. As X increases, Y decreases

large and negative. As X increases, Y increases

large and negative. As X increases, Y decreases

Answer 1

A). the scatterplot be:-

B). Based on the scatterplot:-

The correlation between X and Y is zero

C). necessary calculation table:-

x	y			xy
1	3	1	9	3
3	5	9	25	15
2	1	4	1	2
2	3	4	9	6
sum=8	sum=12	sum=18	sum=44	sum=26

correlation coefficient be:-

  

= 0.5

D)The correlation between X and Y is:-

medium and positive. As X increases, Y increases

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